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  • LM1117: 3.3V applied on Vout when no Vin

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    Part Number: LM1117 Hi team, I received a question about LM1117 from my customer. The customer is considering to use the LM1117 3.3V option. Their question is " Is it ok to apply external 3.3V to Vout when Vin is 0V?". I think that the LM1117 get…
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  • LM1117: When using at low temperature

    Part Number: LM1117 Hello E2E, When LM1117 using at low temperature (less than +10 deg C), a small number of individuals with oscillating output voltage will appear. A tantalum cap is used on the output side, and the design follows the data sheet…
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  • LM1117: Difference in orderable part numbers

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    Part Number: LM1117 LDO team, Can you please tell me the difference between these two orderables? LM1117IMP-3.3/NOPB LM1117IMPX-3.3/NOPB Note the "X". Thanks, Darren
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  • LM1117: 1.8V Fixed Output version?

    Part Number: LM1117 Hi folks, I'm looking for a version of the LM1117 in the fixed 1.8V output with an industrial temperature range (-40C to 125C). Is there a version of the LM1117 with the extended range and 1.8V output? MPX package ( SOT-223) is preferred…
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  • RE: LM1117: Voltage Out without input voltage

    Resolved
    Hey Shibin, I believe what you might be seeing is reverse current flowing from the output of your 5V LDO to the input of your LDO. Most LDOs (including LM1117) do not have Reverse Current Protection so if Vout is higher than Vin by a diode drop then…

  • LM1117: LM1117I-3.3V Version

    TI Thinks Resolved
    Part Number: LM1117 Other Parts Discussed in Thread: TLV1117 , Hello, I wanted some clarity on the range of input voltages that could be supplied to LM1117I-3.3V. The datasheet shows a range Iout between 0 to 800mA for Vin 4.75V to 10V. Is this accurate…
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  • LM1117: Meaning of datasheet items and Operating LM1117.

    Resolved
    Part Number: LM1117 I have some questions about "LM1117". 1. What does "junction temperature" mean in section 6.5 of the datasheet? 2. In particular, the maximum junction temperature seems to be the maximum allowed temperature, so what does the…
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  • LM1117: Output capacitor

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    Part Number: LM1117 Hello team, I have a couple of questions regarding output capacitor selection. 1) From the below datasheet description, we can choose higher than 10uF tantalum or E-cap. Isn't there any limitation for the maximum? (e.g. up to 100uF…
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  • RE: LM1117: LM1117 voltage at input and output drops when GSM module is transmitting data

    Resolved
    Hi Omkar, The GSM is causing a transient on the 5 V rail which results in a line transient for the LM1117. You can reduce the magnitude of the line transient response of the LM1117 by increasing the output capacitance. Alternatively you can attempt…

  • LM1117: Material Difference for Operating Temperature Discrepancy

    Part Number: LM1117 Hi, I'm looking at the datasheet for LM1117 voltage regulators. I'm wondering what the difference is between the standard LM1117 and LM1117I that drives the operational temperature difference. Is there a material or construction…

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